OTTAWA — The Goo Goo Dolls were not at their best at the National Arts Centre on Friday, but there was a reason. Dimpled singer John Rzeznik informed the crowd early in the show that he was feeling under the weather. “Sorry, everybody, I've got a cold,” he said. “But I'll make it through.”With that, the charismatic frontman of the Grammy-winning U.S. band endeared himself to the predominatly female audience. Poor guy, we thought. Look how hard he's working to make us happy.It was a decent, if not spectacular, show. Although Rzeznik's voice carried an extra rasp, the band was ti